// returns null, if not resolved.
public Field getFieldRefAt(int which) {
InstanceKlass klass = getFieldOrMethodKlassRefAt(which);
if (klass == null) return null;
Symbol name = getNameRefAt(which);
Symbol sig = getSignatureRefAt(which);
return klass.findField(name, sig);
}
/** Find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined. */
public Field findField(Symbol name, Symbol sig) {
// search order according to newest JVM spec (5.4.3.2, p.167).
// 1) search for field in current klass
Field f = findLocalField(name, sig);
if (f != null) return f;
// 2) search for field recursively in direct superinterfaces
f = findInterfaceField(name, sig);
if (f != null) return f;
// 3) apply field lookup recursively if superclass exists
InstanceKlass supr = (InstanceKlass) getSuper();
if (supr != null) return supr.findField(name, sig);
// 4) otherwise field lookup fails
return null;
}